rhel pppoe[5412]: Bad TCP checksum 32 问题

最近rhel4.6下的网关总是不稳定，不知什么原因，下面是messages的信息，请大家帮忙解决


[root@rhel ~]# tail /var/log/messages
Jan 26 10:15:20 rhel pppd[5411]: Connect: ppp0 <--> /dev/pts/1
Jan 26 10:15:20 rhel pppoe[5412]: PPP session is 5955
Jan 26 10:15:23 rhel pppd[5411]: Remote message: Authentication success,Welcome!
Jan 26 10:15:23 rhel pppd[5411]: PAP authentication succeeded
Jan 26 10:15:23 rhel pppd[5411]: local IP address 59.39.105.109
Jan 26 10:15:23 rhel pppd[5411]: remote IP address 59.39.96.1
Jan 26 10:15:27 rhel gconfd (root-5400): 地址“xml:readwrite:/root/.gconf”解析为位于 0 的可写入配置源
Jan 26 10:15:27 rhel kernel: mtrr: type mismatch for f0000000,1000000 old: write-back new: write-combining
Jan 26 13:42:26 rhel pppoe[5412]: Bad TCP checksum 32
Jan 26 14:35:41 rhel sshd(pam_unix)[6573]: session opened for user root by (uid=0)